One does not unless one examines the contents of the client.jar found in /IntegrationServer/lib. If it were a public API one could reasonably expect documentation such as that found in the existing API java docs.
On the other hand, for a private API one would not expect such things though one might wish for them ever so much.
One might also use a java decompiler (or simply javap) to view the methods contained in UUID.class but, of course, one would be in violation of the license agreements that one’s employer signed with webMethods.
M
#webMethods#Integration-Server-and-ESB#Flow-and-Java-services